Iran says it uses US-made reactors, enrichment level ‘not important’

Iran is using American-made nuclear reactors and maintains that the level of uranium enrichment is not inherently important, the head of the Atomic Energy Organization of Iran (AEOI) said, as negotiations between Tehran and Washington remain stalled.

"The Tehran reactor we use was built by the Americans. In Canada and the United States, reactors operate with 90% enriched fuel," Mohammad Eslami said on Iranian state television. "So the percentage of enrichment has no particular significance."

The nuclear chief also stressed that 20% enrichment is necessary for research reactors. "Without the capability to design and manufacture reactors and complete the fuel cycle, one cannot claim to be nuclear-capable — and we are now at that level," he said.

Eslami emphasized that Iran’s nuclear development is rooted in national capability. "We have now reached full maturity in the nuclear fuel cycle, which is the foundation of the nuclear industry," he said.

"The West cannot tolerate this and continues to escalate its hostility toward us in every possible way."

He accused the United States and its allies of trying to maintain monopolistic control over nuclear technology. "They have always said Iran should have no domestic reactor and must import fuel indefinitely," Eslami said. "Our response has always been clear: we will not accept such dependency."

He said the West’s portrayal of Iran’s nuclear intentions was misleading. "They do not want development unless it’s under their flag," he said. "But all our progress has been achieved by our own youth."

On Wednesday, Eslami vowed to continue advancing the country’s nuclear program with “faith, revolutionary spirit, and heartfelt conviction,” asserting that Iran will resist excessive demands from the United States and other global powers in a statement addressed to Supreme Leader Ali Khamenei.

Diplomatic talks mediated by Oman between Iranian Foreign Minister Abbas Araghchi and US envoy Steve Witkoff have stalled over Iran’s insistence on maintaining enrichment activities inside the country.

US and Iran want an agreement, UN nuclear watchdog says

International Atomic Energy Agency (IAEA) Director-General Rafael Grossi, speaking in Damascus, said that the agency is not party to the negotiations but remains in close contact with both sides.

"They are negotiating, not us, but it is obvious that the IAEA will have to be the guarantor of whichever agreement they come to," he said.

Grossi expressed cautious optimism. "I think they both want an agreement, which doesn’t mean that it’s easy to get," he said. "But having two sides that want a deal is already a big advantage."

On Wednesday, US President Donald Trump urged Tehran to respond swiftly to American demands. "Time is running out on Iran’s decision pertaining to nuclear weapons, which must be made quickly!" Trump wrote on Truth Social. He also said that Russian President Vladimir Putin had offered to mediate.

In March, Trump warned that if a deal was not agreed upon within two months, the US would bomb Tehran, though he did not state a deadline.

Iran has consistently said that its nuclear program is for peaceful purposes. However, Western powers have accused Tehran of seeking nuclear weapons capabilities—allegations Iran denies.

Iran is the only non-nuclear weapon state enriching uranium to 60% U-235. The IAEA has consistently maintained that there is no credible civilian use for uranium enriched to this level, which is a short technical step from weapons-grade 90% fissile material.